<?php

/**
 * Class LibWexinJssdk
 */
class LibWexinJssdk {
  private $appId;
  private $appSecret;

  public function __construct() {
    $this->appId = 'wx13b0ce87f8202ad4';
    $this->appSecret = 'a3f553d78d3859a04491c59816b53772';
  }

  public function getSignPackage($Nurl=null) {
    $jsapiTicket = $this->getJsApiTicket();
    $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https://" : "http://";
    //测试url
    if($Nurl){
      $url = $Nurl;
    }else{
      $url = "$protocol$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
    }


    $timestamp = time();
    $nonceStr = $this->createNonceStr();

    // 这里参数的顺序要按照 key 值 ASCII 码升序排序
    $string = "jsapi_ticket=$jsapiTicket&noncestr=$nonceStr&timestamp=$timestamp&url=$url";

    $signature = sha1($string);

    $signPackage = array(
      "appId"     => $this->appId,
      "nonceStr"  => $nonceStr,
      "timestamp" => $timestamp,
      "url"       => $url,
      "signature" => $signature,
      "rawString" => $string
    );
    return $signPackage;
  }

  private function createNonceStr($length = 16) {
    $chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
    $str = "";
    for ($i = 0; $i < $length; $i++) {
      $str .= substr($chars, mt_rand(0, strlen($chars) - 1), 1);
    }
    return $str;
  }
  //获取 jsapi_ticket
  private function getJsApiTicket() {
    $filename = $this->dir().'/jsapi_ticket.json';
    $myfile 	= @fopen($filename, "r");
    chmod($filename, 0777);
    $content = @fread($myfile, filesize ($filename));
    $content = json_decode($content);
    //var_dump($content->access_token);exit;
    if($content){
      if($content->expire_time<time()){

        $accessToken = $this->getAccessToken();
        $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
        $res = json_decode($this->httpGet($url));
        $ticket = $res->ticket;
        if($ticket) {
          $data = array(
              'expire_time' => time() + 7000,
              'jsapi_ticket' => $ticket,
          );
         // chmod($filename, 0777);
          $fp = fopen($this->dir()."/jsapi_ticket.json", "w");
          fwrite($fp, json_encode($data));
          fclose($fp);
        }

      }else{
        $ticket = $content->jsapi_ticket;
      }

    }else{
      $accessToken = $this->getAccessToken();
      //chmod($filename, 0777);
      $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
      $res = json_decode($this->httpGet($url));
      $ticket = $res->ticket;
      if($ticket){
        $data=array(
            'expire_time'=>time() + 7000,
            'jsapi_ticket'=>$ticket,
        );
        $fp = fopen($this->dir()."/jsapi_ticket.json", "w");
        fwrite($fp, json_encode($data));
        fclose($fp);
      }
    }

    // jsapi_ticket 应该全局存储与更新，以下代码以写入到文件中做示例
   /* $data = json_decode(@file_get_contents(dirname(__FILE__)."/jsapi_ticket.json"));
    if($data){
      if ($data->expire_time < time()) {
        $accessToken = $this->getAccessToken();
        // 如果是企业号用以下 URL 获取 ticket
        // $url = "https://qyapi.weixin.qq.com/cgi-bin/get_jsapi_ticket?access_token=$accessToken";
        $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=$accessToken";
        $res = json_decode($this->httpGet($url));
        $ticket = $res->ticket;
        if ($ticket) {
          $data->expire_time = time() + 7000;
          $data->jsapi_ticket = $ticket;
          $fp = fopen(dirname(__FILE__)."/jsapi_ticket.json", "w");
          fwrite($fp, json_encode($data));
          fclose($fp);
        }
      } else {
        $ticket = $data->jsapi_ticket;
      }

    }else{
      echo "11111111111";exit;


    }*/
    return $ticket;
  }

  private function getAccessToken() {
    //$data = json_decode(file_get_contents(dirname(__FILE__)."/access_token.json"));
    $filename = $this->dir().'/access_token.json';
    chmod($filename, 0777);
    $myfile 	= @fopen($filename, "r");
    $content = @fread($myfile, filesize ($filename));
    $content = json_decode($content);
    //var_dump($content->expire_time);exit;
    if($content){
      if($content->expire_time<time()){
        $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
        $res = json_decode($this->httpGet($url));
        $access_token = $res->access_token;
        if($access_token){
          $data=array(
              'expire_time'=>time() + 7000,
              'access_token'=>$access_token,
          );
          $fp = @fopen($this->dir()."/access_token.json", "w");
          fwrite($fp, json_encode($data));
          fclose($fp);
        }

      }else{
        $access_token = $content->access_token;
      }

    }else{
      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
      $res = json_decode($this->httpGet($url));
      $access_token = $res->access_token;
      if($access_token){
        $data=array(
            'expire_time'=>time() + 7000,
            'access_token'=>$access_token,
        );
        $fp = fopen($this->dir()."/access_token.json", "w");
        fwrite($fp, json_encode($data));
        fclose($fp);
      }

    }

    // access_token 应该全局存储与更新，以下代码以写入到文件中做示例
//    $data = json_decode(@file_get_contents(dirname(__FILE__)."/access_token.json"));
//    //var_dump($data);exit;
//    if (@$data->expire_time < time()) {
//      // 如果是企业号用以下URL获取access_token
//      // $url = "https://qyapi.weixin.qq.com/cgi-bin/gettoken?corpid=$this->appId&corpsecret=$this->appSecret";
//      $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";
//      $res = json_decode($this->httpGet($url));
//      $access_token = $res->access_token;
//      //echo $access_token;exit;
//      if ($access_token) {
//
//        $data->expire_time = time() + 7000;
//        $data->access_token = $access_token;
//        $fp = fopen(dirname(__FILE__)."/access_token.json", "w");
//        fwrite($fp, json_encode($data));
//        fclose($fp);
//      }
//    } else {
//      $access_token = $data->access_token;
//    }
    return $access_token;
  }

  private function curGet($url){
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    // 设置header
    curl_setopt($curl, CURLOPT_HEADER, 0);
    // 设置cURL 参数，要求结果保存到字符串中还是输出到屏幕上。
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    // 运行cURL，请求网页
    $data = curl_exec($curl);
    // 显示获得的数据
    curl_close($curl);

    return $data;
/*
    $data = json_decode($data,ture);
    $access_token = $data['access_token'];

    //更新文件内容
    $myfile 	= fopen($filename, "w");
    $arr = array('access_token'=>$access_token,'time'=>time());
    fwrite($myfile,serialize($arr));
    fclose($myfile);
*/
  }

  private function httpGet($url) {
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_TIMEOUT, 500);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);
    curl_setopt($curl, CURLOPT_URL, $url);

    $res = curl_exec($curl);
    curl_close($curl);

    return $res;
  }
  public function dir(){
    $dirstring = $_SERVER['DOCUMENT_ROOT'];
    $leng = strripos($dirstring,'/'); //某个字符串最后一次出现的位置
    return $dirsdk = substr($dirstring,0,$leng).'/configs/';

  }
}


?>
